diff --git a/scripts/installer/createtmplt.sh b/scripts/installer/createtmplt.sh
index bd539dd2fb8..95ecd9cb6c9 100755
--- a/scripts/installer/createtmplt.sh
+++ b/scripts/installer/createtmplt.sh
@@ -74,7 +74,7 @@ uncompress() {
          ;;
   bzip2)  bunzip2 -c $1 > $tmpfile
          ;;
-  ZIP)  unzip -p $1 | cat > $tmpfile
+  [zZ][iI][pP])  unzip -p $1 | cat > $tmpfile
         ;;
   *)	printf "$1"
         return 0
diff --git a/scripts/storage/qcow2/createtmplt.sh b/scripts/storage/qcow2/createtmplt.sh
index 8d6dd0d4849..38bb561cd5c 100755
--- a/scripts/storage/qcow2/createtmplt.sh
+++ b/scripts/storage/qcow2/createtmplt.sh
@@ -74,7 +74,7 @@ uncompress() {
          ;;
   bzip2)  bunzip2 -c $1 > $tmpfile
          ;;
-  ZIP)  unzip -p $1 | cat > $tmpfile
+  [zZ][iI][pP])  unzip -p $1 | cat > $tmpfile
         ;;
   *)	printf "$1"
         return 0
diff --git a/scripts/storage/secondary/createtmplt.sh b/scripts/storage/secondary/createtmplt.sh
index 6b31232bc9e..358022b6dec 100755
--- a/scripts/storage/secondary/createtmplt.sh
+++ b/scripts/storage/secondary/createtmplt.sh
@@ -73,7 +73,7 @@ is_compressed() {
          ;;
   bzip2)  ctype="bz2"
          ;;
-  ZIP)  ctype="zip"
+  [zZ][iI][pP])  ctype="zip"
         ;;
     *) echo "File $1 does not appear to be compressed" >&2
         return 1
@@ -92,7 +92,7 @@ uncompress() {
          ;;
   bzip2)  bunzip2 -q -c $1 > $tmpfile
          ;;
-  ZIP)  unzip -q -p $1 | cat > $tmpfile
+  [zZ][iI][pP])  unzip -q -p $1 | cat > $tmpfile
         ;;
     *) printf "$1"
        return 0